PARALLEL LINES

PARALLEL LINES

1. IF TWO LINES IN A PLANE INTERSECT EACH OTHER THEY ARE CALLED PARALLEL LINES

   • EXAMPLES - OPPOSITE SIDES OF BLACKBOARD, SIDES OF RAILWAY TRACKS ETC
     • CO EXTERIOR ANGLES - THE EXTERIOR ANGELS MEANS THEY ARE OUTSIDE OF THE TEO PARALLEL LINES OPPOSITE TO INTERIOR ANGELS WHICH ARE TWO PARALLEL LINES
     • ALTERNATE INTERIOR ANGLES : A PAIR OF ANGLES WITH DIFFERENT VERTICES AND ON OPPOSITE SIDES OF A TRANSVERSAL AT IT'S INTERSECTION WHICH TWO OTHER LINES THE PAIR OF ANGLES INSIDE THE TWO INTERSECTION LINES ARE ALSO CALLED ALTERNATE INTERIOR ANGLE.
     • ALTERNATE EXTERIOR ANGLES : ALTERNATE EXTERIOR ANGLES ARE THE PAIR OF ANGELS THAT LIE ON THE OUTER SIDE OF THE TWO PARALLEL LINES BUT ON EITHER SIDE OF THE TRANSVERSAL LINES
     • CORRESPONDING ANGLE : ANY PAIR OF ANGLES EACH OF WHICH IS ON THE SAME SIDE OF ONE OF TWO OTHER LINES , THE SAME SIDE OF ONE OF TWO OTHER LINES CUT BY A TRANSVERSAL AND ON THE SAME SIDE OF THE TRANSVERSAL
     • CO INTERIOR ANGLE : CO INTERIOR ANGLES ARE THE PAIR OF NON ADJACENT INTERIOR ANGLE THAT LIE ON THE SAME SIDE OF THE TRANSVERSAL ARE CALLED PAIR OF CO INTERIOR ANGELS. IF TWO LINES ARE PARALLEL THEN TWO INTERIOR ANGLES ADD TO GIVE 180 ° AND SO SUPPLEMENTARY